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Questions and Answers
What triggers the initial collapse of giant molecular clouds?
What triggers the initial collapse of giant molecular clouds?
- The shock front from a nearby supernova (correct)
- The radiation pressure from OB associations
- The movement of stars and clouds
- The rotation of spiral galaxies
What is the result of the gravitational collapse of a GMC?
What is the result of the gravitational collapse of a GMC?
- Fragmentation into smaller denser regions that each collapse to form star systems (correct)
- Formation of a planetary system
- No star formation occurs
- Formation of a single massive star
What is the role of convection in the collapse of a protostar?
What is the role of convection in the collapse of a protostar?
- Increasing the kinetic energy of particles
- Trapping thermal energy within the cloud
- Raising the temperature of the gas
- Radiating away thermal energy so that radiation pressure remains lower than gravitational pull (correct)
What is the timescale for the collapse of a 15 M protostar?
What is the timescale for the collapse of a 15 M protostar?
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What is a Hayashi or Pre-main sequence (PMS) track?
What is a Hayashi or Pre-main sequence (PMS) track?
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